Set of key buttons for a handset



FIG. 1 is a front view of a set of key buttons for a handset showing mynew design in the broken line environment of a handset; and,

FIG. 2 is a perspective front view thereof.

The broken line showing of the disclaimed regions in the figures is forillustrative purposes only and forms no portion of the claimed design.

The ornamental design for a set of key buttons for a handset, as shownand described.